15 lines
848 B
HTML
15 lines
848 B
HTML
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<p>
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When you are using pointers, you sometimes actually don't want to talk about the address the pointer points to.
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Maybe you want to talk about the <b>address next to it</b>. Or you want to get the <b>distance between to pointers</b> in memory.
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This is what pointer arithmetic allows you to do. You can use <b>mathematical operations on the addresses</b> of pointers.
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All the operations are done relative to the size of the type the pointer refers to.
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</p>
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<p>
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For example, if you have an pointer to a long long, which is 8bytes big, and add one to the pointer,
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you will get an address 8bytes from your original pointer.
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If you are using an int, you will get one 4bytes from the original.
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</p>
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<p>
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Arrays store all the data next to another in memory. Try using pointer arithmetic to print out all the characters in the array.
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</p>
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